Switching power supply incorporated into electronic thermostats

August 2006 Temperature Measurement

The N320 electronic thermometer, available from Mimic Components/Crafts, can be used to indicate temperature with a high degree of accuracy. It is provided with a convenient, built-in, full range, high efficiency switch mode power supply.

Part of the same family, the N321 thermostats can be programmed for heating or cooling action and have a timed delay function for compressors.

The N321R performs automatic defrost cycles by stopping the compressor at programmed intervals or manually, via keyboard. The temperature readout is held static during defrost and the compressor relay has a delay action at energy start-up.

The N322 has two control relays with independent setpoints used for heating and cooling. The second relay can be relative to the first one.

The N322T finds applications in heating and cooling processes with built-in timer functions for forced defrost periods or other timed or interval related actions.

Other key features of the range include:

* Adjustable hysteresis.

* Flame retardant polycarbonate enclosure

* Working temperature 0 to +50°C.

* IP65 front panel with silicone rubber keys.

* Internal power supply: 85 to 250 V a.c.

* Dimensions: 74 x 32 x 58 mm.

* Optional RS485 interface with Modbus protocol.

* Optional 12 to 24 V a.c./d.c. power supply.

For more information contact Ian Watson, Mimic Components/Mimic Crafts, +27 (0) 11 689 5700, [email protected], www.mimic.co.za

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